oj.uz

Submission #1045740

# Submission time Handle Problem Language Result Execution time Memory
1045740 2024-08-06T07:19:34 Z javotaz Dabbeh (INOI20_dabbeh) C++17
25 / 100
 148 ms 98024 KB 
// In the Name of Allah
 
#include<bits/stdc++.h>
using namespace std;
 
#pragma GCC optimize("Ofast,unroll-loops,fast-math")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4.1,avx,avx2,sse4.2,popcnt,tune=native")
 
typedef long long ll;
 
#define F first
#define S second
#define pii pair<int, int>
#define pb push_back
#define pp pop_back
#define all(x) x.begin(), x.end()
#define MX(x, y) ((b[x] > b[y])? x : y)

const int LG = 19, N = 3e5 + 7, M = 1e4 + 7, K = 5e5 + 7, mod = 1000992299, base = 700;
string s, a[M];
int n, q, p[N][LG], m, mx[2 * M], b[N];
ll h[N], rtb[N];
unordered_set<int> st[K];

void ip() {
	cin >> n >> q;
	for (int i = 0; i < n; i++) 
		cin >> a[i];
	cin >> s;
	m = s.size();
}

int bp(int x, int y) {
	if (y < 2) return y? x : 1;
	ll tmp = bp(x, y / 2);
	tmp = tmp * tmp % mod;
	return (y & 1)? tmp * x % mod : tmp;
}

void solve() {
	for (int i = 0; i < n; i++) {
		ll v = 0, tb = 1;
		for (int j = 0; j < a[i].size(); j++) {
			v = (v + tb * a[i][j]) % mod;
			tb = tb * base % mod;
			st[j + 1].insert(v);
		}
	}
	ll rb = bp(base, mod - 2);
	rtb[0] = 1;
	for (int i = 1; i <= m; i++)
		rtb[i] = rtb[i - 1] * rb % mod;
	ll tb = 1;
	for (int i = 1; i <= m; i++)
		h[i] = (h[i - 1] + s[i - 1] * tb) % mod, tb = tb * base % mod;
	for (int i = 0; i < m; ++i) {
		int l = i, r = m + 1;
		while (r - l > 1) {
			int mid = (l + r) >> 1;
			if (st[mid - i].count((h[mid] - h[i] + mod) * rtb[i] % mod))
				l = mid;
			else
				r = mid;
		}
		b[i] = l;
		mx[m + i] = i;
	}
	for (int i = m - 1; i; --i) 
		mx[i] = MX(mx[i << 1], mx[i << 1 | 1]);
	for (int i = m - 1; ~i; --i) {
		int res = i;
		for (int l = i + m, r = min(b[i] + 1, m) + m; l < r; l >>= 1, r >>= 1) {
			if (l & 1) res = MX(res, mx[l]), l++;
			if (r & 1) r--, res = MX(res, mx[r]);
		}
		p[i][0] = res;
		for (int j = 1; j < LG; ++j)
			p[i][j] = p[p[i][j - 1]][j - 1];
	}
	while (q--) {
		int l, r;
		cin >> l >> r;
		if (b[l] >= r) {
			cout << 1 << '\n';
			continue;
		}
		int res = 0;
		for (int i = LG - 1; ~i; --i)
			if (b[p[l][i]] < r)
				res |= (1 << i), l = p[l][i];
		cout << ((res > m)? -1 : res + 2) << '\n';
	}
}

int32_t main() {
	ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
	ip(), solve();
	return 0;
}

Compilation message

Main.cpp: In function 'void solve()':
Main.cpp:43:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |   for (int j = 0; j < a[i].size(); j++) {
      |                   ~~^~~~~~~~~~~~~

Subtask #1
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 33624 KB Output is correct
2 Correct 96 ms 53172 KB Output is correct
3 Correct 87 ms 48976 KB Output is correct
4 Correct 119 ms 52996 KB Output is correct
5 Correct 89 ms 51280 KB Output is correct
6 Correct 122 ms 55540 KB Output is correct
7 Correct 106 ms 59068 KB Output is correct
8 Correct 148 ms 56912 KB Output is correct
9 Correct 103 ms 54700 KB Output is correct
10 Correct 59 ms 41040 KB Output is correct
11 Correct 80 ms 98024 KB Output is correct
12 Correct 57 ms 65500 KB Output is correct
13 Correct 113 ms 83428 KB Output is correct

Subtask #2
0 / 25.0

# Verdict Execution time Memory Grader output
1 Incorrect 121 ms 64316 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 33624 KB Output is correct
2 Correct 96 ms 53172 KB Output is correct
3 Correct 87 ms 48976 KB Output is correct
4 Correct 119 ms 52996 KB Output is correct
5 Correct 89 ms 51280 KB Output is correct
6 Correct 122 ms 55540 KB Output is correct
7 Correct 106 ms 59068 KB Output is correct
8 Correct 148 ms 56912 KB Output is correct
9 Correct 103 ms 54700 KB Output is correct
10 Correct 59 ms 41040 KB Output is correct
11 Correct 80 ms 98024 KB Output is correct
12 Correct 57 ms 65500 KB Output is correct
13 Correct 113 ms 83428 KB Output is correct
14 Incorrect 121 ms 64316 KB Output isn't correct
15 Halted 0 ms 0 KB -